<ul>
  <li><a [routerLink]="['/home']" routerLinkActive="router-link-active">home</a></li>
  <li><a [routerLink]="['/news']" routerLinkActive="router-link-active">news</a></li>
  <li><a [routerLink]="['/about']" routerLinkActive="router-link-active">about</a></li>
</ul>
<router-outlet></router-outlet>